Price range: $28.60 through $146.62
4″ x 4″ x 7 gauge (.188″ wall) square steel tubing is manufactured from ASTM A500 steel, a cold-formed carbon steel specification designed for heavy-duty structural applications. This hollow structural section (HSS) features a large square profile with a thick wall, providing excellent strength, rigidity, and durability for demanding construction and industrial projects. Typically produced in Grade B, it offers superior weldability, precise dimensional consistency, and reliable performance in high-stress environments.
Applications:
4″ square steel tubing (7ga) is commonly used in:
• Heavy-duty structural frames, supports, and columns
• Industrial machinery bases and equipment supports
• Gates, railings, and security structures
• Trailer frames and automotive fabrication
• Load-bearing fabrication projects
• Structural bracing in commercial and industrial construction
Advantages:
• High strength: Thick wall (.188″) supports heavy loads and resists deformation
• Durable construction: Ideal for demanding structural and industrial applications
• Excellent weldability: Compatible with MIG, TIG, and stick welding
• Versatile fabrication: Can be cut, drilled, and modified for custom projects
• Consistent quality: Manufactured for precise dimensions and reliable fit
Summary:
The 4″ x 4″ x 7 gauge ASTM A500 square steel tube is a heavy-duty and dependable structural material designed for reinforced frames, supports, and load-bearing applications. Its thick wall, strength, and weldability make it ideal for industrial and construction projects requiring durability and performance.
* Prices are subject to change without notice due to fluctuations in the metals market. | All “Value Length” and “Value Pack” item measurements are subject to standard mill tolerances. | Products may be manufactured several thousandths of an inch over or under the stated dimensions and still be within acceptable mill tolerances. All bar, tube, structural, pipe, sheet, plate, and similar products sold on our website are custom cut to the lengths and sizes selected by the customer at the time of purchase. These are not stocked as pre-cut items. Because each order is cut specifically to customer specifications, all cut materials are considered custom products and are not eligible for cancellation, return, or exchange once production has begun. Our standard cutting tolerances are:
